One of your TK, MV30 carburetor photographs is upside down, Doc.
Here's the left side of the carburetor, shown right side up.
The Teikei, MV28 carburetor on my Zong is virtually identical to the Teikei, MV28 carburetor on the current, 2010, Yamaha TW200 motorcycle.
Your ZS250GS has a slightly larger, Teikei, MV30 carburetor.
You got Zongshen quality for your $200, Brother Bill.
Spud
__________________
Spud
"Never argue with an idiot. He will drag you down to his level, and beat you with experience."
Mark Twain
2015 Zongshen ZS250GY-3 (RX3)
2006 Zongshen ZS200GY-2 (Sierra 200)
2005 Honda XR650L
2004 Honda CRF250X
1998 Kawasaki KDX220
Mods made to my Zongshen ZS200GY-2:
http://www.chinariders.net/showthread.php?t=6894